<template>
  <div>
    <el-checkbox-group v-model="checkList" @change="statusChange">
      <el-checkbox label="A"></el-checkbox>
      <el-checkbox label="B"></el-checkbox>
      <el-checkbox label="C"></el-checkbox>
    </el-checkbox-group>
  </div>
</template>

<script>

export default {
  data() {
    return {
      checkList: ['A'],
    }
  },
  methods: {
    statusChange(value) {
      if (this.checkList.length > 1) {
        this.checkList.splice(0, 1)
      }
    }
  }
}
</script>

<style scoped lang='less'></style>